Camera optical lens comprising six lenses of -+++−− refractive powers

ABSTRACT

The present disclosure discloses a camera optical lens. The camera optical lens including, in an order from an object side to an image side, a first lens, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens, a fifth lens, and a sixth lens. The first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of glass material, the fifth lens is made of plastic material, and the sixth lens is made of glass material. The camera optical lens further satisfies specific conditions.

FIELD OF THE PRESENT DISCLOSURE

The present disclosure relates to optical lens, in particular to a camera optical lens suitable for handheld devices such as smart phones and digital cameras and imaging devices.

DESCRIPTION OF RELATED ART

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but the photosensitive devices of general camera lens are no other than Charge Coupled Device (CCD) or Complementary metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices shrink, coupled with the current development trend of electronic products being that their functions should be better and their shape should be thin and small, miniature camera lens with good imaging quality therefor has become a mainstream in the market. In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. And, with the development of technology and the increase of the diverse demands of users, and under this circumstances that the pixel area of photosensitive devices is shrinking steadily and the requirement of the system for the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structure gradually appear in lens design. There is an urgent need for ultra-thin wide-angle camera lenses which have good optical characteristics and the chromatic aberration of which is fully corrected.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the exemplary embodiments can be better understood with reference to the following drawings. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.

FIG. 1 is a schematic diagram of a camera optical lens in accordance with a first embodiment of the present invention;

FIG. 2 presents the longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 presents the lateral color of the camera optical lens shown in FIG. 1;

FIG. 4 presents the field curvature and distortion of the camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a camera optical lens in accordance with a second embodiment of the present invention;

FIG. 6 presents the longitudinal aberration of the camera optical lens shown in FIG. 5;

FIG. 7 presents the lateral color of the camera optical lens shown in FIG. 5;

FIG. 8 presents the field curvature and distortion of the camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a camera optical lens in accordance with a third embodiment of the present invention;

FIG. 10 presents the longitudinal aberration of the camera optical lens shown in FIG. 9;

FIG. 11 presents the lateral color of the camera optical lens shown in FIG. 9;

FIG. 12 presents the field curvature and distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The present disclosure will hereinafter be described in detail with reference to several exemplary embodiments. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiments. It should be understood the specific embodiments described hereby is only to explain the disclosure, not intended to limit the disclosure.

Embodiment 1

As referring to FIG. 1, the present invention provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 of embodiment 1 of the present invention, the camera optical lens 10 comprises six lenses. Specifically, from the object side to the image side, the camera optical lens 10 comprises in sequence: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. Optical element like optical filter GF can be arranged between the sixth lens L6 and the image surface Si. The first lens L1 is made of plastic material, the second lens L2 is made of plastic material, the third lens L3 is made of plastic material, the fourth lens L4 is made of glass material, the fifth lens L5 is made of plastic material, and the sixth lens L6 is made of glass material.

The second lens L2 has a positive refractive power, and the third lens L3 has a positive refractive power.

Here, the focal length of the whole camera optical lens 10 is defined as f, the focal length of the first lens is defined as f1. The camera optical lens 10 further satisfies the following condition: −3≤f1/f≤−1. Condition −3≤f1/f≤−1 fixes the negative refractive power of the first lens L1. If the upper limit of the set value is exceeded, although it benefits the ultra-thin development of lenses, but the negative refractive power of the first lens L1 will be too strong, problem like aberration is difficult to be corrected, and it is also unfavorable for wide-angle development of lens. On the contrary, if the lower limit of the set value is exceeded, the negative refractive power of the first lens L1 becomes too weak, it is then difficult to develop ultra-thin lenses. Preferably, the following condition shall be satisfied, −2.762≤f1/f≤−1.45.

The refractive index of the fourth lens L4 is defined as n4. Here the following condition should be satisfied: 1.7≤n4≤2.2. This condition fixes the refractive index of the fourth lens L4, and refractive index within this range benefits the ultra-thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.704≤n4≤2.002.

The refractive index of the sixth lens L6 is defined as n6. Here the following condition should be satisfied: 1.7≤n6≤2.2. This condition fixes the refractive index of the sixth lens L6, and refractive index within this range benefits the ultra-thin development of lenses, and it also benefits the correction of aberration. Preferably, the following condition shall be satisfied, 1.704≤n6≤2.002.

The focal length of the fifth lens L5 is defined as f5, and the focal length of the sixth lens L6 is defined as f6. Condition 1.8

f5/f6

3 fixes the ratio between the focal length f5 of the fifth lens L5 and the focal length f6 of the sixth lens L6, a ratio within this range can effectively reduce the sensitivity of lens group used in camera and further enhance the imaging quality. Preferably, the following condition shall be satisfied, 1.803

f5/f6

2.756.

When the focal length of the camera optical lens 10 of the present invention, the focal length of each lens, the refractive power of the related lens, and the total optical length, the thickness on-axis and the curvature radius of the camera optical lens satisfy the above conditions, the camera optical lens 10 has the advantage of high performance and satisfies the design requirement of low TTL.

In this embodiment, the first lens L1 has a negative refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The curvature radius of the object side surface of the first lens L1 is defined as R1, the curvature radius of the image side surface of the first lens L1 is defined as R2. The camera optical lens 10 further satisfies the following condition: 2.73≤(R1+R2)/(R1−R2)≤10.59, by which, the shape of the first lens L1 can be reasonably controlled and it is effectively for correcting spherical aberration of the camera optical lens. Preferably, the condition 4.36≤(R1+R2)/(R1−R2)≤8.47 shall be satisfied.

The thickness on-axis of the first lens L1 is defined as d1. The following condition: 0.02≤d1/TTL≤0.07 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.04≤d1/TTL≤0.06 shall be satisfied.

In this embodiment, the second lens L2 has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the second lens L2 is f2. The following condition should be satisfied: 0.41≤f2/f≤1.30. The positive refractive power of the second lens L2 within this range can be reasonably controlled, which can properly and effectively balance the field curvature of the system and the spherical aberration caused by the negative refractive power of the first lens L1. Preferably, the condition 0.65≤f2/f≤1.04 should be satisfied.

The curvature radius of the object side surface of the second lens L2 is defined as R3, the curvature radius of the image side surface of the second lens L2 is defined as R4. The following condition should be satisfied: −2.68≤(R3+R4)/(R3−R4)≤−0.85, which fixes the shape of the second lens L2 and when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like chromatic aberration of the on-axis is difficult to be corrected. Preferably, the following condition shall be satisfied, −1.67≤(R3+R4)/(R3−R4)≤−1.07.

The thickness on-axis of the second lens L2 is defined as d3. The following condition: 0.06≤d3/TTL≤0.17 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.09≤d3/TTL≤0.14 shall be satisfied.

In this embodiment, the third lens L3 has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the third lens L3 is f3. The following condition should be satisfied: 1.25≤f3/f≤4.58. When the condition is satisfied, it is beneficial for the system to balance field curvature and further enhance the imaging quality. Preferably, the condition 2.00≤f3/f≤3.67 should be satisfied.

The curvature radius of the object side surface of the third lens L3 is defined as R5, the curvature radius of the image side surface of the third lens L3 is defined as R6. The following condition should be satisfied: −8.35≤(R5+R6)/(R5−R6)≤−2.42, by which, the shape of the third lens L3 can be effective controlled and it is beneficial for shaping of the third lens L3, further, it also can avoid bad molding and stress caused by the excessive curvature of the third lens L3. Preferably, the following condition shall be satisfied, −5.22≤(R5+R5)/(R5−R6)≤−3.02.

The thickness on-axis of the third lens L3 is defined as d5. The following condition: 0.03≤d5/TTL≤0.09 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.05≤d5/TTL≤0.07 shall be satisfied.

In this embodiment, the fourth lens L4 has a positive refractive power with a concave object side surface relative to the proximal axis and a convex image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the fourth lens L4 is f4. The following condition should be satisfied: 1.10≤f4/f≤3.30, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity. Preferably, the condition 1.76≤f4/f≤2.64 should be satisfied.

The curvature radius of the object side surface of the fourth lens L4 is defined as R7, the curvature radius of the image side surface of the fourth lens L4 is defined as R8. The following condition should be satisfied: 2.09≤(R7+R8)/(R7−R8)≤7.42, by which, the shape of the fourth lens L4 is fixed, further, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be satisfied, 3.35≤(R7+R8)/(R7−R8)≤5.93.

The thickness on-axis of the fourth lens L4 is defined as d7. The following condition: 0.04≤d7/TTL≤0.12 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.06≤d7/TTL≤0.09 shall be satisfied.

In this embodiment, the fifth lens L5 has a negative refractive power with a concave object side surface relative to the proximal axis and a convex image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the fifth lens L5 is f5. The following condition should be satisfied: −9.53≤f5/f≤−2.85, which can effectively smooth the light angles of the camera and reduce the tolerance sensitivity. Preferably, the condition −5.95≤f5/f≤−3.56 should be satisfied.

The curvature radius of the object side surface of the fifth lens L5 is defined as R9, the curvature radius of the image side surface of the fifth lens L5 is defined as R10. The following condition should be satisfied: −21.54≤(R9+R10)/(R9−R10)≤−6.67, by which, the shape of the fifth lens L5 is fixed, further, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be satisfied, −13.46≤(R9+R10)/(R9−R10)≤−8.34.

The thickness on-axis of the fifth lens L5 is defined as d9. The following condition: 0.03≤d9/TTL≤0.08 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.04≤d9/TTL≤0.06 shall be satisfied.

In this embodiment, the sixth lens L6 has a negative refractive power with a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis.

The focal length of the whole camera optical lens 10 is f, the focal length of the sixth lens L6 is f6. The following condition should be satisfied: −4.74≤f6/f≤−1.26, the appropriate distribution of refractive power makes it possible that the system has better imaging quality and lower sensitivity. Preferably, the condition −2.96≤f6/f≤−1.58 should be satisfied.

The curvature radius of the object side surface of the sixth lens L6 is defined as R11, the curvature radius of the image side surface of the sixth lens L6 is defined as R12. The following condition should be satisfied: 1.79≤(R11+R12)/(R11−R12)≤5.73, by which, the shape of the sixth lens L6 is fixed, further, when beyond this range, with the development into the direction of ultra-thin and wide-angle lenses, problem like aberration of the off-axis picture angle is difficult to be corrected. Preferably, the following condition shall be satisfied, 2.86≤(R11+R12)/(R11−R12)≤4.59.

The thickness on-axis of the sixth lens L6 is defined as d11. The following condition:0.09≤d11/TTL≤0.31 should be satisfied. When the condition is satisfied, it is beneficial for realization of the ultra-thin lens. Preferably, the condition 0.15≤d11/TTL≤0.25 shall be satisfied.

The focal length of the whole camera optical lens 10 is f, the combined focal length of the first lens L1 and the second lens L2 is f12. The following condition should be satisfied: 0.73≤f12/f≤2.33, which can effectively avoid the aberration and field curvature of the camera optical lens, suppress the rear focal length for realizing the ultra-thin lens, and maintain the miniaturization of lens system. Preferably, the condition 1.16≤f12/f≤1.86 should be satisfied.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 5.17 mm, it is beneficial for the realization of ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 4.94 mm.

In this embodiment, the camera optical lens 10 is large aperture and the aperture F number of the camera optical lens 10 is less than or equal to 2.06. A large aperture has better imaging performance. Preferably, the aperture F number of the camera optical lens 10 is less than or equal to 2.02.

With such design, the total optical length TTL of the whole camera optical lens 10 can be made as short as possible, thus the miniaturization characteristics can be maintained.

In the following, an example will be used to describe the camera optical lens 10 of the present invention. The symbols recorded in each example are as follows. The unit of distance, radius and center thickness is mm.

TTL: the total distance from the object side surface of the first lens to the image plane along the optic axis.

Preferably, inflexion points and/or arrest points can also be arranged on the object side surface and/or image side surface of the lens, so that the demand for high quality imaging can be satisfied, the description below can be referred for specific implementable scheme.

The design information of the camera optical lens 10 in the first embodiment of the present invention is shown in the following, the unit of the focal length, distance, radius and center thickness is mm.

The design information of the camera optical lens 10 in the first embodiment of the present invention is shown in the tables 1 and 2.

TABLE 1 R d nd νd S1 ∞ d0= −0.120 R1 1.575 d1= 0.217 nd1 1.671 ν1 19.24 R2 1.184 d2= 0.050 R3 1.493 d3= 0.536 nd2 1.545 ν2 55.99 R4 10.313 d4= 0.120 R5 2.463 d5= 0.270 nd3 1.545 ν3 55.99 R6 4.015 d6= 0.499 R7 −3.859 d7= 0.368 nd4 1.702 ν4 41.24 R8 −2.371 d8= 0.334 R9 −0.813 d9= 0.252 nd5 1.636 ν5 23.97 R10 −0.993 d10= 0.030 R11 2.847 d11= 0.966 nd6 1.713 ν6 53.87 R12 1.666 d12= 0.748 R13 ∞ d13= 0.210 ndg 1.517 νg 64.17 R14 ∞ d14= 0.100

Where:

In which, the meaning of the various symbols is as follows.

S1: Aperture;

R: The curvature radius of the optical surface, the central curvature radius in case of lens;

R1: The curvature radius of the object side surface of the first lens L1;

R2: The curvature radius of the image side surface of the first lens L1;

R3: The curvature radius of the object side surface of the second lens L2;

R4: The curvature radius of the image side surface of the second lens L2;

R5: The curvature radius of the object side surface of the third lens L3;

R6: The curvature radius of the image side surface of the third lens L3;

R7: The curvature radius of the object side surface of the fourth lens L4;

R8: The curvature radius of the image side surface of the fourth lens L4;

R9: The curvature radius of the object side surface of the fifth lens L5;

R10: The curvature radius of the image side surface of the fifth lens L5;

R11: The curvature radius of the object side surface of the sixth lens L6;

R12: The curvature radius of the image side surface of the sixth lens L6;

R13: The curvature radius of the object side surface of the optical filter GF;

R14: The curvature radius of the image side surface of the optical filter GF;

d: The thickness on-axis of the lens and the distance on-axis between the lens;

d0: The distance on-axis from aperture S1 to the object side surface of the first lens L1;

d1: The thickness on-axis of the first lens L1;

d2: The distance on-axis from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: The thickness on-axis of the second lens L2;

d4: The distance on-axis from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: The thickness on-axis of the third lens L3;

d6: The distance on-axis from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: The thickness on-axis of the fourth lens L4;

d8: The distance on-axis from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: The thickness on-axis of the fifth lens L5;

d10: The distance on-axis from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

d11: The thickness on-axis of the sixth lens L6;

d12: The distance on-axis from the image side surface of the sixth lens L6 to the object side surface of the optical filter GF;

d13: The thickness on-axis of the optical filter GF;

d14: The distance on-axis from the image side surface to the image surface of the optical filter GF;

nd: The refractive index of the d line;

nd1: The refractive index of the d line of the first lens L1;

nd2: The refractive index of the d line of the second lens L2;

nd3: The refractive index of the d line of the third lens L3;

nd4: The refractive index of the d line of the fourth lens L4;

nd5: The refractive index of the d line of the fifth lens L5;

nd6: The refractive index of the d line of the sixth lens L6;

ndg: The refractive index of the d line of the optical filter GF;

vd: The abbe number;

v1: The abbe number of the first lens L1;

v2: The abbe number of the second lens L2;

v3: The abbe number of the third lens L3;

v4: The abbe number of the fourth lens L4;

v5: The abbe number of the fifth lens L5;

v6: The abbe number of the sixth lens L6;

vg: The abbe number of the optical filter GF.

Table 2 shows the aspherical surface data of the camera optical lens 10 in the embodiment 1 of the present invention.

TABLE 2 Conic Index Aspherical Surface Index k A4 A6 A8 A10 A12 A14 A16 R1 −1.1910E+00 −1.1639E−01 5.8813E−02 −7.5417E−02 −2.5016E−02  6.4768E−03  1.3451E−01 −9.7833E−02  R2 −2.1772E+00 −1.2652E−01 2.1471E−01 −2.3718E−01 −2.1214E−01  2.9762E−01  3.2590E−01 −3.5685E−01  R3  8.3156E−01 −1.6241E−01 1.7636E−01 −1.5167E−01 −2.1626E−01  1.2721E−01  3.8540E−01 −2.9280E−01  R4 −1.0000E+02 −1.6707E−01 1.4101E−01 −9.2865E−02  7.3830E−02 −1.6851E−02 −1.5122E−01 1.9849E−01 R5 −9.4666E−01 −1.6431E−01 2.0687E−02 −1.6444E−03  2.0752E−02 −2.3771E−04 −8.9323E−02 1.0365E−01 R6  4.4223E+00 −5.3495E−02 −9.1584E−02  −2.2285E−02  1.1844E−01 −1.0958E−01 −8.0113E−02 9.1365E−02 R7  0.0000E+00 −1.2753E−01 −1.2561E−03  −9.1246E−02 −1.8360E−02  2.8735E−02 −2.6700E−02 9.3018E−03 R8  3.2136E+00 −1.0504E−01 1.7049E−02  1.9830E−02 −2.7265E−02 −3.7442E−03  6.1025E−03 1.9229E−02 R9 −3.3045E+00 −1.2131E−01 2.8738E−02 −3.6897E−02 −8.0996E−04  1.4475E−02 −1.4663E−03 −2.0046E−03  R10 −3.1167E+00  4.4194E−03 −3.0282E−02   6.8874E−03  1.4770E−03  8.2775E−04  3.0504E−04 −1.4323E−04  R11 −1.9084E+01 −1.0223E−01 1.8198E−02 −5.5459E−05  2.5340E−05 −1.4450E−05 −2.0421E−05 3.8008E−06 R12 −8.8950E+00 −4.1467E−02 8.3241E−03 −1.4567E−03  1.2276E−04 −3.0515E−06 −3.8166E−07 3.1942E−08

Among them, K is a conic index, A4, A6, A8, A10, A12, A14, A16 are aspheric surface indexes.

IH: Image Height y=(x ² /R)/[1+{1−(k+1)(x ² /R ²)}^(1/2)]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰ +A12x ¹² +A14x ¹⁴ +A16x ¹⁶  (1)

For convenience, the aspheric surface of each lens surface uses the aspheric surfaces shown in the above condition (1). However, the present invention is not limited to the aspherical polynomials form shown in the condition (1).

Table 3 and table 4 show the inflexion points and the arrest point design data of the camera optical lens 10 lens in embodiment 1 of the present invention. In which, P1R1 and P1R2 represent respectively the object side surface and image side surface of the first lens L1, P2R1 and P2R2 represent respectively the object side surface and image side surface of the second lens L2, P3R1 and P3R2 represent respectively the object side surface and image side surface of the third lens L3, P4R1 and P4R2 represent respectively the object side surface and image side surface of the fourth lens L4, P5R1 and P5R2 represent respectively the object side surface and image side surface of the fifth lens L5, P6R1 and P6R2 represent respectively the object side surface and image side surface of the sixth lens L6. The data in the column named “inflexion point position” are the vertical distances from the inflexion points arranged on each lens surface to the optic axis of the camera optical lens 10. The data in the column named “arrest point position” are the vertical distances from the arrest points arranged on each lens surface to the optic axis of the camera optical lens 10.

TABLE 3 Inflexion point Inflexion point Inflexion point number position 1 position 2 P1R1 1 0.665 P1R2 1 0.705 P2R1 0 P2R2 2 0.225 0.785 P3R1 2 0.475 0.855 P3R2 1 0.475 P4R1 0 P4R2 1 1.015 P5R1 0 P5R2 1 1.135 P6R1 2 0.435 1.655 P6R2 1 0.665

TABLE 4 Arrest point position Arrest point number Arrest point position 1 2 P1R1 0 P1R2 0 P2R1 0 P2R2 2 0.405 0.875 P3R1 0 P3R2 1 0.735 P4R1 0 P4R2 0 P5R1 0 P5R2 0 P6R1 1 0.815 P6R2 1 1.485

FIG. 2 and FIG. 3 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 10 in the first embodiment. FIG. 4 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 10 in the first embodiment, the field curvature S in FIG. 4 is a field curvature in the sagittal direction, T is a field curvature in the meridian direction.

Table 13 shows the various values of the embodiments 1, 2, 3, and the values corresponding with the parameters which are already specified in the conditions.

As shown in Table 13, the first embodiment satisfies the various conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 1.799 mm, the full vision field image height is 2.933 mm, the vision field angle in the diagonal direction is 77.72°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described.

Table 5 and table 6 show the design data of the camera optical lens 20 in embodiment 2 of the present invention.

TABLE 5 R d nd νd S1 ∞ d0= −0.120 R1 1.675 d1= 0.221 nd1 1.671 ν1 19.24 R2 1.206 d2= 0.046 R3 1.469 d3= 0.530 nd2 1.545 ν2 55.99 R4 11.087 d4= 0.130 R5 2.343 d5= 0.286 nd3 1.545 ν3 55.99 R6 3.998 d6= 0.501 R7 −3.716 d7= 0.365 nd4 1.762 ν4 40.10 R8 −2.394 d8= 0.373 R9 −0.832 d9= 0.241 nd5 1.636 ν5 23.97 R10 −1.011 d10= 0.030 R11 2.985 d11= 0.940 nd6 1.773 ν6 49.60 R12 1.720 d12= 0.728 R13 ∞ d13= 0.210 ndg 1.517 νg 64.17 R14 ∞ d14= 0.100

Table 6 shows the aspherical surface data of each lens of the camera optical lens 20 in embodiment 2 of the present invention.

TABLE 6 Conic Index Aspherical Surface Index k A4 A6 A8 A10 A12 A14 A16 R1 −1.4808E+00 −1.2210E−01 6.7249E−02 −7.1090E−02 −2.9155E−02 9.0616E−03  1.2647E−01 −9.1426E−02  R2 −2.5535E+00 −1.3611E−01 2.1618E−01 −2.2469E−01 −2.0296E−01 2.9186E−01  3.1356E−01 −3.5071E−01  R3  7.3843E−01 −1.8633E−01 1.7683E−01 −1.4311E−01 −2.0941E−01 1.2219E−01  3.7648E−01 −2.8472E−01  R4 −1.0000E+02 −1.7679E−01 1.5019E−01 −1.0947E−01  7.3645E−02 −2.1470E−03  −1.4056E−01 1.7884E−01 R5 −1.2685E+00 −1.6483E−01 1.3254E−02  8.5498E−05  2.5614E−02 8.5052E−03 −8.3043E−02 8.0450E−02 R6  3.9946E+00 −5.5716E−02 −9.7346E−02  −3.0881E−02  1.2517E−01 −9.6452E−02  −7.8299E−02 7.6631E−02 R7  0.0000E+00 −1.2476E−01 −4.5053E−03  −8.5712E−02 −1.8024E−02 2.2373E−02 −3.1160E−02 3.0901E−02 R8  3.2138E+00 −1.0473E−01 1.5619E−02  1.8441E−02 −2.7969E−02 −2.9083E−03   6.2548E−03 1.8283E−02 R9 −3.3265E+00 −1.2450E−01 3.1034E−02 −3.5791E−02 −1.2084E−04 1.4362E−02 −1.5418E−03 −2.0108E−03  R10 −3.2308E+00  1.1352E−02 −2.8669E−02   7.1496E−03  1.5080E−03 7.9186E−04  2.3719E−04 −2.0186E−04  R11 −1.8773E+01 −9.8165E−02 1.7695E−02 −1.4332E−04  1.3801E−05 −1.5024E−05  −2.0637E−05 3.7696E−06 R12 −9.4846E+00 −4.2552E−02 8.5318E−03 −1.4801E−03  1.2570E−04 −2.6917E−06  −4.0096E−07 2.0256E−08

Table 7 and table 8 show the inflexion points and the arrest point design data of the camera optical lens 20 lens in embodiment 2 of the present invention.

TABLE 7 Inflexion point Inflexion point number Inflexion point position 1 position 2 P1R1 1 0.645 P1R2 1 0.685 P2R1 0 P2R2 2 0.215 0.795 P3R1 2 0.475 0.865 P3R2 1 0.465 P4R1 0 P4R2 1 1.015 P5R1 0 P5R2 1 1.105 P6R1 1 0.445 P6R2 1 0.655

TABLE 8 Arrest point position Arrest point number Arrest point position 1 2 P1R1 0 P1R2 0 P2R1 0 P2R2 2 0.375 0.895 P3R1 0 P3R2 1 0.725 P4R1 0 P4R2 0 P5R1 0 P5R2 0 P6R1 1 0.825 P6R2 1 1.455

FIG. 6 and FIG. 7 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 20 in the second embodiment. FIG. 8 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 20 in the second embodiment.

As shown in Table 13, the second embodiment satisfies the various conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 1.786 mm, the full vision field image height is 2.933 mm, the vision field angle in the diagonal direction is 78.09°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as embodiment 1, the meaning of its symbols is the same as that of embodiment 1, in the following, only the differences are described.

Table 9 and table 10 show the design data of the camera optical lens 30 in embodiment 3 of the present invention.

TABLE 9 R d nd νd S1 ∞ d0= −0.120 R1 1.738 d1= 0.222 nd1 1.6713 ν1 19.24 R2 1.199 d2= 0.045 R3 1.427 d3= 0.532 nd2 1.5445 ν2 55.99 R4 11.687 d4= 0.143 R5 2.253 d5= 0.294 nd3 1.5445 ν3 55.99 R6 3.968 d6= 0.521 R7 −3.656 d7= 0.349 nd4 1.8044 ν4 39.59 R8 −2.426 d8= 0.399 R9 −0.852 d9= 0.243 nd5 1.6355 ν5 23.97 R10 −1.027 d10= 0.030 R11 3.035 d11= 0.871 nd6 1.8040 ν6 46.57 R12 1.707 d12= 0.741 R13 ∞ d13= 0.210 ndg 1.5168 νg 64.17 R14 ∞ d14= 0.100

Table 10 shows the aspherical surface data of each lens of the camera optical lens 30 in embodiment 3 of the present invention.

TABLE 10 Conic Index Aspherical Surface Index k A4 A6 A8 A10 A12 A14 A16 R1 −1.7576E+00 −1.2865E−01 7.6348E−02 −6.9312E−02 −2.8620E−02 4.0782E−03  1.2041E−01 −8.3094E−02  R2 −2.9000E+00 −1.4679E−01 2.1370E−01 −2.0752E−01 −1.9366E−01 2.7683E−01  2.9198E−01 −3.2470E−01  R3  6.0243E−01 −2.1964E−01 1.7826E−01 −1.3804E−01 −2.0315E−01 1.1928E−01  3.6941E−01 −2.7784E−01  R4 −1.0000E+02 −1.8686E−01 1.4546E−01 −1.1474E−01  8.6955E−02 4.4418E−03 −1.4492E−01 1.6480E−01 R5 −1.6664E+00 −1.6898E−01 1.2311E−02 −7.8501E−03  3.4448E−02 3.6165E−02 −7.0884E−02 4.3265E−02 R6  2.8056E+00 −5.8263E−02 −1.0542E−01  −3.5947E−02  1.3861E−01 −8.4152E−02  −7.7543E−02 6.5208E−02 R7  0.0000E+00 −1.1726E−01 −6.2015E−03  −7.8073E−02 −1.6659E−02 1.5551E−02 −3.6127E−02 3.9927E−02 R8  3.2516E+00 −9.8627E−02 1.8597E−02  1.6482E−02 −2.8970E−02 −2.2877E−03   5.9681E−03 1.6754E−02 R9 −3.1456E+00 −1.3100E−01 3.7138E−02 −3.6524E−02 −2.6586E−03 1.3484E−02 −1.6396E−03 −1.0093E−03  R10 −3.1318E+00  1.4942E−02 −2.8732E−02   6.9771E−03  1.3729E−03 7.2587E−04  2.2169E−04 −1.9366E−04  R11 −1.7471E+01 −9.5062E−02 1.7023E−02 −2.1935E−04  1.0297E−05 −1.6384E−05  −2.0362E−05 3.8241E−06 R12 −9.9764E+00 −4.3360E−02 8.4111E−03 −1.4353E−03  1.2453E−04 −2.8967E−06  −4.2879E−07 1.3905E−08

Table 11 and table 12 show the inflexion points and the arrest point design data of the camera optical lens 30 lens in embodiment 3 of the present invention.

TABLE 11 Inflexion point Inflexion point Inflexion point Inflexion point number position 1 position 2 position 3 P1R1 1 0.635 P1R2 3 0.655 0.795 0.855 P2R1 0 P2R2 2 0.205 0.805 P3R1 2 0.475 0.855 P3R2 1 0.455 P4R1 0 P4R2 1 1.015 P5R1 0 P5R2 1 1.115 P6R1 1 0.455 P6R2 1 0.645

TABLE 12 Arrest point position Arrest point number Arrest point position 1 2 P1R1 0 P1R2 0 P2R1 0 P2R2 2 0.355 0.905 P3R1 0 P3R2 1 0.715 P4R1 0 P4R2 0 P5R1 0 P5R2 0 P6R1 1 0.845 P6R2 1 1.415

FIG. 10 and FIG. 11 show the longitudinal aberration and lateral color schematic diagrams after light with a wavelength of 470 nm, 555 nm and 650 nm passes the camera optical lens 30 in the third embodiment. FIG. 12 shows the field curvature and distortion schematic diagrams after light with a wavelength of 555 nm passes the camera optical lens 30 in the third embodiment.

As shown in Table 13, the third embodiment satisfies the various conditions.

In this embodiment, the pupil entering diameter of the camera optical lens is 1.803 mm, the full vision field image height is 2.933 mm, the vision field angle in the diagonal direction is 77.70°, it has wide-angle and is ultra-thin, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

TABLE 13 Embodiment Embodiment 1 Embodiment 2 3 f 3.598 3.573 3.606 f1 −9.077 −7.860 −6.851 f2 3.128 3.042 2.921 f3 10.992 9.761 8.997 f4 7.922 7.852 7.919 f5 −15.382 −15.496 −17.175 f6 −8.522 −7.748 −6.838 f12 5.224 5.441 5.600 (R1 + R2)/(R1 − R2) 7.059 6.150 5.450 (R3 + R4)/(R3 − R4) −1.339 −1.306 −1.278 (R5 + R6)/(R5 − R6) −4.175 −3.830 −3.627 (R7 + R8)/(R7 − R8) 4.189 4.621 4.944 (R9 + R10)/(R9 − R10) −10.005 −10.304 −10.768 (R11 + R12)/(R11 − R12) 3.822 3.719 3.571 f1/f −2.523 −2.200 −1.900 f2/f 0.869 0.851 0.810 f3/f 3.055 2.732 2.495 f4/f 2.202 2.198 2.196 f5/f −4.275 −4.338 −4.764 f6/f −2.369 −2.169 −1.897 f12/f 1.452 1.523 1.553 d1 0.217 0.221 0.222 d3 0.536 0.530 0.532 d5 0.270 0.286 0.294 d7 0.368 0.365 0.349 d9 0.252 0.241 0.243 d11 0.966 0.940 0.871 Fno 2.000 2.000 2.000 TTL 4.700 4.700 4.700 d1/TTL 0.046 0.047 0.047 d3/TTL 0.114 0.113 0.113 d5/TTL 0.057 0.061 0.062 d7/TTL 0.078 0.078 0.074 d9/TTL 0.054 0.051 0.052 d11/TTL 0.206 0.200 0.185 n1 1.671 1.671 1.671 n2 1.545 1.545 1.545 n3 1.545 1.545 1.545 n4 1.702 1.762 1.804 n5 1.636 1.636 1.636 n6 1.713 1.772 1.804 v1 19.243 19.243 19.243 v2 55.987 55.987 55.987 v3 55.987 55.987 55.987 v4 41.239 40.100 39.586 v5 23.972 23.972 23.972 v6 53.867 49.598 46.570

It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed. 

What is claimed is:
 1. A camera optical lens comprising, from an object side to an image side in sequence: a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, and a sixth lens having a negative refractive power; wherein the camera optical lens further satisfies the following conditions: −3

f1/f

−1; 1.7

n4

2.2; 1.7

n6

2.2; 1.8

f5/f6

3; where f: focal length of the camera optical lens; f1: focal length of the first lens; f5: focal length of the fifth lens; f6: focal length of the sixth lens; n4: refractive index of the fourth lens; n6: refractive index of the sixth lens.
 2. The camera optical lens as described in claim 1, wherein the first lens is made of plastic material, the second lens is made of plastic material, the third lens is made of plastic material, the fourth lens is made of glass material, the fifth lens is made of plastic material, the sixth lens is made of glass material.
 3. The camera optical lens as described in claim 1 further satisfying the following conditions: −2.762

f1/f

−1.45; 1.701

n4

2.002; 1.707

n6

2.002; 1.803

f5/f6

2.756.
 4. The camera optical lens as described in claim 1, wherein first lens has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: 2.73

(R1+R2)/(R1−R2)

10.59; 0.02

d1/TTL

0.07; where R1: curvature radius of object side surface of the first lens; R2: curvature radius of image side surface of the first lens; d1: thickness on-axis of the first lens; TTL: total distance from the object side surface of the first lens to the image plane along the optic axis.
 5. The camera optical lens as described in claim 4 further satisfying the following conditions: 4.36

(R1+R2)/(R1−R2)

8.47; 0.04

d1/TTL

0.06.
 6. The camera optical lens as described in claim 1, wherein the second lens has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: 0.41

f2/f

1.30; −2.68

(R3+R4)/(R3−R4)

−0.85; 0.06

d3/TTL

0.17; where f: focal length of the camera optical lens; f2: focal length of the second lens; R3: curvature radius of the object side surface of the second lens; R4: curvature radius of the image side surface of the second lens; d3: thickness on-axis of the second lens; TTL: total distance from the object side surface of the first lens to the image plane along the optic axis.
 7. The camera optical lens as described in claim 6 further satisfying the following conditions: 0.65

f2/f

1.04; −1.67

(R3+R4)/(R3−R4)

−1.07; 0.09

d3/TTL

0.14.
 8. The camera optical lens as described in claim 1, wherein the third lens has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: 1.25

f3/f

4.58; −8.35

(R5+R6)/(R5−R6)

−2.42; 0.03

d5/TTL

0.09; where f: focal length of the camera optical lens; f3: focal length of the third lens; R5: curvature radius of the object side surface of the third lens; R6: curvature radius of the image side surface of the third lens; d5: thickness on-axis of the third lens; TTL: total distance from the object side surface of the first lens to the image plane along the optic axis.
 9. The camera optical lens as described in claim 8 further satisfying the following conditions: 2.00

f3/f

3.67; −5.22

(R5+R6)/(R5−R6)

−3.02; 0.05

d5/TTL

0.07.
 10. The camera optical lens as described in claim 1, wherein the fourth lens has a concave object side surface relative to the proximal axis and a convex image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: 1.10

f4/f

3.30; 2.09

(R7+R8)/(R7−R8)

7.42; 0.04

d7/TTL

0.12; where f: focal length of the camera optical lens; f4: focal length of the fourth lens; R7: curvature radius of the object side surface of the fourth lens; R8: curvature radius of the image side surface of the fourth lens; d7: thickness on-axis of the fourth lens; TTL: total distance from the object side surface of the first lens to the image plane along the optic axis.
 11. The camera optical lens as described in claim 10 further satisfying the following conditions: 1.76

f4/f

2.64; 3.35

(R7+R8)/(R7−R8)

5.93; 0.06

d7/TTL

0.09.
 12. The camera optical lens as described in claim 1, wherein the fifth lens has a concave object side surface relative to the proximal axis and a convex image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: −9.53

f5/f

−2.85; −21.54

(R9+R10)/(R9−R10)

−6.67; 0.03

d9/TTL

0.08; where f: focal length of the camera optical lens; f5: focal length of the fifth lens; R9: curvature radius of the object side surface of the fifth lens; R10: curvature radius of the image side surface of the fifth lens; d9: thickness on-axis of the fifth lens; TTL: total distance from the object side surface of the first lens to the image plane along the optic axis.
 13. The camera optical lens as described in claim 12 further satisfying the following conditions: −5.95

f5/f

−3.56; −13.46

(R9+R10)/(R9−R10)

−8.34; 0.04

d9/TTL

0.06.
 14. The camera optical lens as described in claim 1, wherein the sixth lens has a convex object side surface relative to the proximal axis and a concave image side surface relative to the proximal axis; the camera optical lens further satisfies the following conditions: −4.74

f6/f

−1.26; 1.79

(R11+R12)/(R11−R12)

5.73; 0.09

d11/TTL

0.31; where f: focal length of the camera optical lens; f6: focal length of the sixth lens; R11: curvature radius of the object side surface of the sixth lens; R12: curvature radius of the image side surface of the sixth lens; d11: thickness on-axis of the sixth lens; TTL: total distance from the object side surface of the first lens to the image plane along the optic axis.
 15. The camera optical lens as described in claim 14 further satisfying the following conditions: −2.96

f6/f

−1.58; 2.86

(R11+R12)/(R11−R12)

4.59; 0.15

d11/TTL

0.25.
 16. The camera optical lens as described in claim 1 further satisfying the following condition: 0.73

f12/f

2.33; where f12: combined focal length of the first lens and the second lens; f: focal length of the camera optical lens.
 17. The camera optical lens as described in claim 16 further satisfying the following condition: 1.16

f12/f

1.86.
 18. The camera optical lens as described in claim 1, wherein total distance from the object side surface of the first lens to the image plane along the optic axis is less than or equal to 5.17 mm.
 19. The camera optical lens as described in claim 1, wherein aperture F number of the camera optical lens is less than or equal to 2.06.
 20. The camera optical lens as described in claim 19, wherein the aperture F number of the camera optical lens is less than or equal to 2.02. 